10. Optimization of Electron Transport Layer Based on Cadmium Sulfide for Perovskite Solar Cells

The deposition of CdS thin film using three different methods, that is, thermal vapor deposition, electrodeposition and chemical bath deposition for the application as electron transport layer (ETL) in perovskite solar cells has been reported. Surface morphology of thin films obtained by all three methods was analyzed using SEM images. Optical properties were studied using UV-visible spectroscopy. The film deposited by thermal vapor deposition showed high uniformity, and however, adherence properties and transmittance properties are found to be poor. Thin film fabricated by chemical bath deposition showed high uniformity with very good adherence properties but poor transmittance. Thin film obtained by electrodeposition showed good surface morphology, improved adherence properties and best transmittance properties in the visible region and was found suitable to be used as ETL.